I was wondering how people get up to level 50... that's crazy to me. I've only completed one play-through, and I got to level 30 doing every side quest I could. I'm sure I missed out on some, but I really tried to do everything possible. I can't imagine earning enough XP for 20 additional levels.

There's really no point to it either. Much past 30, they shouldn't even bother trying to distinguish between classes or alignment. You've used up just about every useful feat and the only force powers left are from the opposing alignment. Plus you have to cheat to get there anyway.